diff options
| author | bringert <bringert@cs.chalmers.se> | 2005-11-30 16:00:06 +0000 |
|---|---|---|
| committer | bringert <bringert@cs.chalmers.se> | 2005-11-30 16:00:06 +0000 |
| commit | cba2fcb9b118cedb603b171ac7d7581c5adb844c (patch) | |
| tree | 5f777207338134402d07486d334dcc764d933027 /transfer/lib/nat.tr | |
| parent | 86df2a69b149c1f4ff2cb9139447f5a6faccd483 (diff) | |
Moved transfer libraries to transfer/lib
Diffstat (limited to 'transfer/lib/nat.tr')
| -rw-r--r-- | transfer/lib/nat.tr | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/transfer/lib/nat.tr b/transfer/lib/nat.tr new file mode 100644 index 000000000..c529e5238 --- /dev/null +++ b/transfer/lib/nat.tr @@ -0,0 +1,18 @@ +data Nat : Type where + Zero : Nat + Succ : (n:Nat) -> Nat + +plus : Nat -> Nat -> Nat +plus Zero y = y +plus (Succ x) y = Succ (plus x y) + +pred : Nat -> Nat +pred Zero = Zero +pred (Succ n) = n + +natToInt : Nat -> Int +natToInt Zero = 0 +natToInt (Succ n) = 1 + natToInt n + +intToNat : Int -> Nat +intToNat n = if n == 0 then Zero else Succ (intToNat (n-1)) |